CN102713544B - Infrared motion sensor - Google Patents
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- CN102713544B CN102713544B CN201080048697.XA CN201080048697A CN102713544B CN 102713544 B CN102713544 B CN 102713544B CN 201080048697 A CN201080048697 A CN 201080048697A CN 102713544 B CN102713544 B CN 102713544B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J5/0025—Living bodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/07—Arrangements for adjusting the solid angle of collected radiation, e.g. adjusting or orienting field of view, tracking position or encoding angular position
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0846—Optical arrangements having multiple detectors for performing different types of detection, e.g. using radiometry and reflectometry channels
Abstract
An infrared motion sensor has a multi element IR detector with first and second separate arrays of optical elements associated with respective first and second detector elements and a partition of a material substantially opaque to IR radiation and substantially transparent to visible/NIR light arranged to separate the IR optical paths from the first and second optical elements to the respective first and second detector elements. In this way, the detector elements function individually with respect to IR radiation and individual optical elements produce separate and independently oriented fields of view on the first and second sides of the sensor, while visible/NIR light still falls on both detector elements so that detector element signals resulting from NIR radiation roughly cancel one another.
Description
Technical field
Relate generally to passive infrared of the present invention (PIR) motion sensor.
Background technology
Passive infrared motion sensor is generally comprised of several features.Optical element (such as lens or catoptron (mirror)) and infrared (IR) detecting device limit together and collect from the visual field radiation of (intersecting and therefore define the spatial volume of supervision), optical element is sent to radiation infrared (IR) detecting device from visual field, and this infrared detector generally responds to the mid-infrared light within the scope of 6-14 micron wave length.Detecting device then in monitored volume and the change of carrying out to optical element in surperficial effective blackbody temperature of object of radiation respond and electric signal be provided, this signal is passed to analog processing circuit, this analog processing circuit then produce digital signal, this digital signal can be directly or indirectly compares with the specific threshold amount of the temperature change of " being seen " from institute in monitored volume by optical element.This digital signal can further be processed by logical circuit, to the output indication of expectation is provided, for example, the output of the expectation that warmer people passes above from the cooler object in monitored volume or background is indicated.When for example detecting, by change in the caused radiation of temperature difference between movement " target " (people) and its background, motion sensor is generally transferred to host computer system by indication, and this host computer system can transfer to activate intrusion " alarm ", changes room illumination, opens door or carry out some other functions.
Infrared moving sensing system typically comprises optical element (lens/catoptron) array, and this array is arranged to the IR radiation from people to be directed to from the juxtaposed IR detecting device in the volume that will be monitored.Other radiation that is delivered to this IR detecting device by this array (for example, visible ray and near infrared (NIR) light) be superfluous and can cause wrong motion sensing, even because do not having from the IR radiation in monitored volume, high level this radiation also can cause that this detecting device transmits.For avoiding the motion sensing of this mistake, IR detector element typically becomes opposed polarity to placing, (not by the IR array of optical elements of sensor focus on) superfluous radiation is approximately equally dropped on two elements, this generation cancel each other about equally and relative signal.Yet this practice means that the volume of the Optical Monitoring of sensor also becomes opposed polarity pair, this is provided with the restriction to monitored Volume design.
PIR motion sensor typically adopts thermoelectricity IR detecting device to measure the change in IR radiation intensity.Figure 1A to Fig. 1 C shows two views and the schematic symbols of the pyroelectric detector 10 of simple prior art.This detecting device is operated by " piezoelectric effect ", and it causes charge migration in the situation that having mechanical stress.Pyroelectric detector is taked the form of capacitor-by two electric guide plates 12 of dielectric 14 separation.This dielectric is piezoelectric ceramics normally.When IR radiation causes temperature change (and therefore causing some mechanical stresses) in pottery.Electric charge moves to another plate from a plate.If do not have external circuit to be connected to detecting device, voltage occurs when " capacitor " charges.If connected external circuit between plate, electric current depends on the resistance of circuit and flows.
The in the situation that of one of voltage or current both, " signal " of pyroelectric detector is very little, and these detecting devices are responsive, fragile, and because small, unintentional electric current is subject to error effect.Therefore, they conventionally produce and are accommodated in the hermetically enclosed cover case of filling dry nitrogen in " dust free room " environment.This and other factors make pyroelectric detector become the signal portion (5-10%) of the cost of typical PIR motion sensor, and therefore most of PIR motion sensors only adopt one or two this detecting device.
In order only to monitor large space with one or two detecting device, typical PIR motion sensor is designed to have the array (for example, lens or catoptron) of a plurality of optical elements on sensor surface.Fig. 2 shows the PIR motion sensor 15 of simple prior art, it has the array 16 of optical element, this array monitors the space that is divided into sub-volumes or the volume that monitors 17, this sub-volumes or the volume that monitors 17 corresponding with the visual field being limited by each optical element and detecting device.Each optical element is focused into the IR radiation of the object in the sub-volumes from monitored space the image occurring on detecting device 10.Because optical element can be manufactured at an easy rate, optical array can comprise up to 50 or even more optical elements, and wherein each optical element is directed to detecting device by radiation from the separated sub-volumes 17 in monitored space.
Sub-volumes can be inserted into the sub-volumes not monitoring, makes the radiation generation target (for example people) of transmitting between sub-volumes at detecting device place, cause " target emanation/background radiation/target emanation " pattern.The in the situation that of people, because of for people's some parts almost always carries out radiation with the different intensity of the intensity from background (being caused by the temperature that is different from ambient temperature), this pattern causes that the radiation of detecting device changes (and therefore changing temperature).The piezoelectric current obtaining and/or voltage are the ripple signals with respect to the time, this ripple signal can be sent out by bandpass filter, be exaggerated and send to the signal processor of sensor, for exceed the quantity of the crest of designated reference level by assessment, determine motion.
At pyroelectric detector, become between the two basic decades of PIR motion sensor, many improvement have reduced the possibility of false alarm.For preventing that visible ray and near infrared light from arriving detecting device, added light filter and be used as detector window.And, increased the array of optical elements that coating (in the situation of catoptron) and adjuvant (for lens) prevent sensor visible ray and NIR light have been focused on to detecting device.These steps have reduced owing to for example building by luminous the seeing through of automobile headlamp the possibility that makes PIR motion sensor generation false alarm that the caused signal of window causes.Yet, this improvement being had to practice and cost restriction, therefore need to adopt with the following method, by the method, in the situation that having superfluous radiation, detecting device self can be launched less signal.
A kind of ad hoc approach for the false alarm that prevents from causing by disturbing visible ray and NIR light is, detector element is placed with relative detection polarity in pairs with equal sizes, make by the light of the array of optical elements of sensor focusing (not, non-IR radiation) be tending towards being equally incident on two elements of element, thereby make to offset roughly each other from the signal of identical and relative element.Fig. 3 A to Fig. 3 D shows three views and the schematic symbols of the dual element detector 20 of typical prior art, and this dual element detector 20 has the detector element 22,24 of formed objects and relative direction polarity.Because element is not accurately to equate, and radiation is not accurately even, therefore offsets and imperfection.Yet this is effect improved to the inhibition of non-focusing radiation (having surpassed unit piece detecting device).The non-intruding that identical and opposed element can also reduce by other type stimulates the less desirable signal producing, and non-intruding stimulates all vibrations and temperature change in this way.
Detector element has the length breadth ratio between 1:2 and 1:4 conventionally, to approach the distribution from upright people's far infrared radiation.Fig. 4 A shows the pattern of the sub-volumes 25 monitoring in the dual-element sensing system 26 of prior art, and this pattern results from the dual opposed polarity detector element (length breadth ratio 1:2) as in Fig. 3 E is arranged on as after the identical array of optical elements 16 in Fig. 2.Fig. 3 E is length breadth ratio and juxtaposed " functional diagram " that the longitudinal cross-section of the sub-volumes that monitors 25 being caused by detector element has been described.As in thering is the sensor of discrete component detecting device, sub-volumes can be staggered with the sub-volumes not monitoring, makes the radiation generation target (for example people) of transmitting between sub-volumes at detecting device place, cause " target emanation/background radiation/target emanation " pattern.In this case, because the element of opposed polarity generates the crest of alter polarity, as illustrated in Fig. 4 B.Moreover, in the prior art sensor at Fig. 2, the piezoelectric current obtaining and/or voltage are the ripple signals of relative time, this ripple signal can be sent out by bandpass filter, be exaggerated and send to the signal processor of sensor, for exceed quantity and the polarity of the crest of designated reference level by assessment, determine motion.
The dual element detector system of the prior art of Fig. 4 A has some problems.Because the detecting device of motion sensor is generally placed on the focus place of optical element, the sub-volumes of supervision is the projection of the shape of detector element, extends all the time in the angle being limited by optical focal length and detector element size.This can be a problem while being commonly referred to the motion sensor of Special Category of " light curtain (curtain) " sensor in design.Such sensor is designed to monitor long, narrow volume (as being in actual applications the volume of rectangular prism shape length, narrow between museum visitor and object that they are just watching).From the side, the set of the volume that monitors of picking sensor (by some optical elements and a dual opposing elements detecting device juxtaposition are limited) covers the vertical angle that approaches 90 ° conventionally, as seen in Fig. 5, wherein by dual opposing elements detecting device with five transparent define every pair of sub-volumes of five couples of sub-volumes 25(to shown in Fig. 4 A to similar).So-called " light curtain " is the set of monitored volume, and this institute monitors that the set of volume compares its degree of depth and occupied rectangular prism higher and widelyr, and the set of the volume of monitoring is a little shaped as the occupied volume of light curtain by pleating.
Fig. 6 is the top view of the volume that monitors 25 of the prior art systems of Fig. 4 A and Fig. 5.Due to angle, the shape of the volume that monitors is not the shape of " light curtain " veritably, because this volume increases widelyr along with the distance from sensor.By making the shape of light curtain more constant for each vertical angle with the optical element of different focal.Such system realizes with the catoptron that changes focal length conventionally.Fig. 7 is the top plan view that the mirror design picking sensor 38 of prior art has been described, this sensor 38 has monitored volume 30A, 30B; 32A, 32B; 34A, 34B; 35A, 35B and 36A, 36B, wherein mirror elements has different focal, make in every side of sensor, the angular breadth of each visual field or the volume that monitors is different from other visual field or the volume that monitors, angle between every pair of visual field (that is, 30A and 30B, 32A and 32B etc.) about equally simultaneously.Arrange that focal length makes for longer visual field, angular breadth is less, wherein the longest visual field or volume 30A and the 30B of monitoring have minimum angular breadth, thereby have allowed " light curtain " 40 keeping narrow from the longer distance of sensor, are different from the Lens Design of the prior art of Fig. 6.Yet, use the sensing system of catoptron more expensive, and the system of comparing based on lens is more difficult to manufacture.There is the more picking sensor system of uniform light curtain shape and also may there are the lens that change focal length, yet, at lens arra, form in the positive ordinary movement sensor of sensor, this design has caused the problem of less desirable sensor outward appearance, because lens must be placed on from the variation distance of (share) detecting device, the front of sensor has been produced to ugly and irregular outward appearance.
Summary of the invention
Embodiment described here provides a kind of new, light curtain type PIR motion sensor, its be based on lens and its " the light curtain " of the volume that monitors is provided.
In one embodiment, a kind of infrared moving sensor comprises: multicomponent infrared (IR) detecting device, there is at least one pair of detector element, this at least one pair of detector element comprises the first detector element of the first polarity and the second detector element of the second relative polarity, at least one first optical element, be associated with this first detector element, and be configured to the IR radiation of first volume that monitors from predetermined to focus in this first detector element, at least one second optical element, be associated with this second detector element, and be configured to the IR radiation of second volume that monitors from predetermined to focus in this second detector element, and dividing plate, between this first and second detector element, this dividing plate has at least IR the radiation opaque and material to visible radiation/non-IR radiation substantial transparent at least substantially, and this dividing plate is configured to substantially stop that the IR radiation from this first optical element arrives this second detector element, and substantially stop that the IR radiation from this second optical element arrives this first detector element.
In one embodiment, more than first and second optical element or array of optical elements on the opposite side separately of the first and second detector element and the opaque dividing plate of IR are associated, and wherein IR dividing plate stops that the IR radiation from the optical element in every side of sensor arrives the detector element on opposite side.Together with associated optical element, detecting device can comprise single to detector element, wherein the first detector element in a side of dividing plate and the second detector element on opposite side, maybe can comprise that two or more are to detector element, wherein all the first detector element in a side of dividing plate and all the second detector element on opposite side.
In one embodiment, on the angular orientation of each optical element in array in different from other optical element detector element with respect to separately, visual field is directed on different angular direction separately.The dividing plate of the first and second array of optical elements separation has been allowed in the visual field of two detector element or the separation between volume that monitors, made the visual field can be for each detector element by individually directed.This is different from pir sensor design of prior art, and wherein visual field must be with relative polarity to development, and the visual field of the corresponding optical element of two detector element must be oriented set.The advantage that the present embodiment has is that all optical elements (such as lens etc.) can have identical focal length, because clean cone of coverage is determined by visual field direction rather than by the focal length changing.Replace the focal length changing, the orientation of each lens or optical element is individually changed to produce " the light curtain " more uniformly of supervision volume or visual field.The front that this means sensor can be made more smooth and attractive, has still utilized the lower cost of the IR sensor based on lens simultaneously.
This embodiment of the present invention allows to limit by the focal length of the optical element/detector element juxtaposition with variable rather than variation the effective angle of sub-volumes or the volume that monitors, realizes long, narrow light curtain shape and there is no lens problem of appearance.Compare with the layout with the prior art of the optical element that changes focal length, embodiment described above has optical element, when watching on surface level, this optical element have substantially equate angular breadth but on different angular direction directed visual field.
Because the thin-walled between detector element or dividing plate are only transparent to visible ray/NIR, this superfluous radiation is still tending towards equally dropping in each relative polarity detector element, and the signal cancellation from relative polarity detector element being produced by this radiation is fallen.This has greatly reduced the signal being generated by superfluous radiation.
Accompanying drawing explanation
The present invention and its structure and both details of operation can partly be collected by research accompanying drawing, and wherein identical reference number relates to identical part, and wherein:
Figure 1A is the lateral elevational view of the unit piece pyroelectric detector of prior art;
Figure 1B is the skeleton view of detecting device of the prior art of Figure 1A;
Fig. 1 C has illustrated the schematic symbols for the thermoelectricity IR detecting device of the prior art of Figure 1A and Figure 1B;
Fig. 2 is the skeleton view of detecting device of the prior art of Figure 1A to Fig. 1 C of being associated of the optical array in the PIR motion sensor having schematically illustrated with prior art, to being divided into the sub-volumes controlled the visual field of each optical element in array or the space of the volume that monitors, monitors;
Fig. 3 A is similar to Figure 1A but the lateral elevational view of the dual-element thermoelectricity IR detecting device of prior art has been described;
Fig. 3 B is the top plan view of detection side of dual element detector of the prior art of Fig. 3 A;
Fig. 3 C is the top plan view of reverse side of dual element detector of the prior art of Fig. 3 A and Fig. 3 B;
Fig. 3 D has illustrated the schematic symbols for the dual-element thermoelectricity IR detecting device of the prior art of Fig. 3 A to Fig. 3 C;
Fig. 3 E is the functional diagram of dual element detector of the prior art of Fig. 3 A to Fig. 3 D;
Fig. 4 A has schematically illustrated and has utilized as illustrated in Fig. 3 A to Fig. 3 E, the sub-volumes of prior art PIR motion sensor or the skeleton view of the volume that monitors that are placed in the optical array identical with Fig. 2 dual-element pyroelectric detector afterwards, one of them people monitors volume by this institute;
Fig. 4 B illustrated and produced target by indicated while monitoring volume in as Fig. 4 A when radiation such as people, from an example of the output signal of the sensor of the prior art of Fig. 4 A;
Fig. 5 be use as " light curtain " sensor of the prior art of the dual element detector in Fig. 3 A to Fig. 4 A and five optical elements the lateral elevational view of the volume that monitors or visual field;
Fig. 6 is that the sensor of the prior art of Fig. 5 is arranged and the top plan view of the volume that monitors;
Fig. 7 be prior art mirror design IR motion sensor the top plan view of the volume that monitors or visual field;
Fig. 8 is the perspective schematic view of an embodiment of IR " light curtain " motion sensor based on lens;
Fig. 9 be Fig. 8 picking sensor the top plan view of the volume that monitors or visual field;
Figure 10 is the amplification vertical view of part of the sensor of Fig. 9, and the position of two optical elements in the front of sensor has been described.
Embodiment
Specific embodiment provides for PIR light curtain motion sensor systems as disclosed herein, the dual-element IR detecting device wherein with relative polarity detector element has separated, independent directed lens or the optical element being associated with detector element separately, wherein each lens can be individually angled with respect to detector element separately, to control the spacing between volume that monitors, therefore and control the width of " light curtain " or the volume set that monitors, and do not change lens separately and the spacing between detector element.
After reading this description, how in various alternate embodiments and alternate application, to realize the present invention and will become for those skilled in the art clear.Yet, although will describe various embodiment of the present invention at this, it being understood that only unrestriced mode is presented these embodiment with example.Equally, this detailed description of various alternate embodiment should not be taken as and limit the scope of the invention or width.
As discussed above, Fig. 1 to Fig. 7 has illustrated IR detecting device and the IR motion sensor of various prior aries, and wherein Fig. 7 has illustrated the light curtain type motion sensor of prior art, and it produces more constant light curtain shape with the catoptron that changes focal length.Fig. 8 to Figure 10 has illustrated an embodiment of the IR picking sensor 50 of revising, it has avoided some problems of the light curtain type motion sensor of prior art, and allows by revising the directed of optical element or lens rather than controlling light curtain shape by revising focal length.
The picking sensor 50 of Fig. 8 comprises substantially: opposed polarity dual-element IR detecting device 20, and its similar to Fig. 3 A to Fig. 3 D, has two detector element 22,24 of relative polarity; The first array of optical elements 52, is associated with this first detector element 22; The second array of optical elements 54, is associated with this second detector element 24; And thin-walled or dividing plate 55, it is made by least basic transparent material of the opaque but visible ray/NIR of Shangdi IR, is placed between two elements 22,24 and from detecting device 20 and laterally stretches out.In certain embodiments, this dividing plate can extend to outside surface 66(Figure 10 of sensor always), on this outside surface 66, located array of optical elements.This dividing plate does not need to extend to the outside surface of sensor always, but have enough sizes, to stop lens sensor one side otherwise, is delivered to all IR rays of the detector element on opposite side.Therefore dividing plate 52 isolates two detector element mutually.By this way, two detector element are separated, and each detector element can have its oneself one or more optical elements independently, rather than as the single optical element for two detector element in the layout of the prior art illustrating in Fig. 4 A.This dividing plate can have straight polymer material or other analog material, all polycarbonate in this way of straight polymer material, and it is opaque and be transparent to a great extent in visible ray/NIR scope in middle IR scope.
In Fig. 8, two lens or the optical element 56 that are associated have been described, and two transparent or optical elements 58 that are associated with the second detector element 24 on opposite side have been described in a side with the first detector element 22.Yet in alternative embodiment, the optical element of more or less quantity can be provided in every side of sensor.In certain embodiments, each optical array can comprise up to 50 or even more optical lens or element, depends on the space that will be monitored.In other alternative embodiment, there is the dual element detector 20 that can be used to replace Fig. 8 more than the multicomponent detecting device of a pair of relative polarity detector element, four-element detector for example, or there is the detecting device of three pairs or more multipair relative polarity detector element.In these alternative, between the positive detector element of this dividing plate in a side and the negative detector element of every pair on opposite side, extend, wherein each positive detector element and negative detector element are associated with array of optical elements separately.
In the layout of the prior art of Fig. 5 and Fig. 6, with five lens, produce ten spaces that monitor, wherein each lens is directed to IR radiation in two detector element.In the embodiment of Fig. 8 and Fig. 9, with ten lens, replace five and monitor as ten volumes in Fig. 5 and Fig. 6, wherein five lens are associated with each detector element that is independent of other detector element.Arrange these lens with produce the different angular direction of the volume that monitored or visual field, as Fig. 9 and illustrated in fig. 10.In this case, each detector element has its oneself lens, and therefore, during sensor is manufactured, each volume that monitors can individually be adjusted.Unlike the catoptron example of Fig. 7, lens in this embodiment all have identical focal length, and therefore projection all there is the volume that monitors of identical angular breadth.The direction that can control each volume that monitors is shaped the light curtain 60 obtaining.
Fig. 9 has illustrated when above surface level or when surface level is watched, the top view of an example of " the light curtain " of ten volumes that monitor that produced by the sensor of Fig. 8, this sensor has five lens that are associated with the detector element 22 that produces volume 62A, 62B, 62C, 62D, the 62E of monitoring, and five lens that are associated with the detector element 24 that produces volume 64A, 64B, 64C, 64D, the 64E of monitoring.The side view of the volume that monitors is in this embodiment identical with Fig. 5's.In this embodiment, each the volume that monitors or visual field direction can by each lens of suitable selection, juxtaposition or the angle of associated detector element be controlled relatively.Therefore, as illustrated in fig. 9, such as the shorter scope of volume 62D and 63D and 62E and 64E the volume that monitors or visual field (that is, directed they and the crossing visual field, the ground of proximity transducer more of making) can outwards be rotated in case shorter scope with the visual field separately of the same range in the every side at sensor between more wide angle widen light curtain.Paired volume such as the longer scope of 62A and 64A inwardly rotated (even to [+] and [-] crossing place rotation and in dead zone 65 offseting signal partly) so that the angular separation between volume 62A and 64A narrow down, and therefore in longer scope, light curtain is narrowed down, produce more uniform light curtain width or shape.Fig. 9 has illustrated one of many possible alternative sensor field of view layouts, it can be realized by the angle of each lens of suitable adjustment or optical element, so that be controlled in the side separately of institute's monitor area the angular distance on surface level between the volume that monitors or visual field, this monitor area is monitored with associated optical element by detector element separately.In this embodiment, the angle between the visual field on the opposite side of sensor reduces with the scope of visual field, wherein maximum angle between visual field 62E and 64E and minimum angles between the longest visual field 62A and 64A.In this embodiment, visual field 62A and 64A superpose to produce dead zone 65, but in alternative embodiment, angle can be arranged to differently change, and depends on the size in the region that will be monitored.Therefore,, in different embodiment, each lens can be rotated to make the change of shape of light curtain 60.
As mentioned above, dividing plate 55 stops that the IR radiation of the lens directs a side of sensor arrives the detector element on the opposite side of sensor.On the other hand, visible radiation or non-IR radiation are by the transmission of dividing plate institute.Therefore, superfluous radiation is still tending towards equally dropping in each opposed polarity detector element, make still to cancel out each other roughly as the signal being produced by [+] and [-] detector element 22,24 of the result of this radiation, greatly reduced the signal being produced by this superfluous radiation.
In one embodiment, sensor 50 has outside surface 66, and dividing plate 55 extends transverse to the central authorities of outside surface from the position between detector element 22,24, and as illustrated in Figure 10, and in some instances, this dividing plate can be connected to outside surface.Optical element to be to be positioned on outside surface from the substantially the same distance of detector element, but directed with different angles, to produce the light curtain shape needing.The optical element of lens arra 54 or center A and the B of two (wherein for clarity sake having omitted other lens) in lens 58 in positive 66, together with corresponding field of view (FOV) 64A and 64B and as be illustrated by the example in Figure 10 by the indicated image focusing in detector element 24 of dotted line.
The picking sensor of Fig. 8 to Figure 10 monitors volume by the IR detector element of optical element and discrete (single) is carried out to juxtaposition, has retained by opposed polar component simultaneously given superfluous radiation is suppressed.Therefore, opposed polar component is to still being used, and the IR optical path that leads to discrete detector element for example, is spaced to the transparent material of superfluous radiation (visible ray/NIR light) to IR radiation opaque by use simultaneously.Like this, can arrange that detector element individually works with respect to IR radiation, and approximately equally drop on the element both sides of every couple when upper when superfluous radiation lamina of septum pellucidum allows this radiation, still opposed polar component centering, work.
Any those skilled in the art provide the above description of disclosed embodiment so that can manufacture or use the present invention.To the various modifications of these embodiment by being readily understood that with those skilled in the art, and in the situation that not deviating from the spirit and scope of the present invention, general principle described here can be applied to other embodiment, therefore, should be understood that, therefore the description presenting at this and accompanying drawing have represented currently preferred embodiments of the present invention, and have represented the theme of being expected widely by the present invention.Further it being understood that scope of the present invention comprises other embodiment it will be apparent to those skilled in the art completely, and scope of the present invention is only correspondingly limited by claims.
Claims (19)
1. an infrared moving sensor, comprising:
Multicomponent infrared (IR) detecting device, has outside surface and at least one pair of detector element, and this at least one pair of detector element comprises and is positioned at the first detector element of the first polarity on this outside surface and the second detector element of the second relative polarity;
At least one first optical element, is associated with this first detector element, and is configured to the infrared radiation of first volume that monitors from predetermined to focus in this first detector element;
At least one second optical element, is associated with this second detector element, and is configured to the infrared radiation of second volume that monitors from predetermined to focus in this second detector element; And
Dividing plate, between this first and second detector element, this dividing plate has at least the infrared radiation opaque and material to visible radiation/near infrared (NIR) radiation substantial transparent at least substantially, and this dividing plate is configured to stop that all infrared radiations are delivered to this second detector element and are delivered to this first detector element from this second optical element from this first optical element at least substantially.
2. the sensor of claim 1, comprise the first array of optical elements being associated with this first detector element, and the second array of optical elements being associated with this second detector element, this dividing plate is configured to stop that all infrared radiations are delivered to this second detector element from this first optical element arbitrarily at least substantially, at least substantially stop that all infrared radiations are delivered to this first detector element from this second optical element arbitrarily, and allow to be delivered to respectively in this second and first detector element by this dividing plate from the visible radiation/near-infrared radiation of this first and second optical element.
3. the sensor of claim 2, wherein when watching on surface level, each optical element in array separately has the visual field with the angled orientation in visual field of other optical element in array separately, and the visual field of two array of optical elements is configured to produce the shape of predetermined light curtain.
4. the sensor of claim 3, wherein optical element comprises the lens of the same focal length.
5. the sensor of claim 3, wherein the shape of light curtain has substantially width uniformly.
6. the sensor of claim 3, the vicissitudinous scope of visual field tool of the optical element in each array wherein, and the angle of visual field on surface level reduces along with the increase of the length of visual field separately.
7. the sensor of claim 1, wherein this sensor has outside surface, and optical element is positioned on this outside surface, and dividing plate extends to this outside surface from detecting device.
8. the sensor of claim 7, the position of its median septum between the first and second array of optical elements extends to the outside surface of sensor from sensor.
9. the sensor of claim 1, wherein this dividing plate has straight polymer material.
10. an infrared moving sensor, comprising:
At least one multicomponent infrared (IR) detecting device, has at least one pair of detector element, and this at least one pair of detector element comprises the first infrared detector element of the first polarity and the second infrared detector element of the second polarity;
The first array of the first optical element, each first optical element has predetermined visual field and the predetermined visual field direction on surface level, and each first optical element is configured to the radiation receiving from its predetermined visual field to be separately directed to this first detector element;
The second array of the second optical element, each second optical element has predetermined visual field and the predetermined visual field direction on surface level, and each second optical element is configured to the radiation receiving from its predetermined visual field to be separately directed to this second detector element;
Dividing plate between this first detector element and the second detector element, have at least the infrared radiation opaque and material to visible radiation/near infrared (NIR) radiation substantial transparent at least substantially, and be configured to stop from the infrared radiation of the first optical element arbitrarily arrive this second detector element at least substantially, and at least substantially stop from the infrared radiation of the second optical element arbitrarily and arrive this first detector element.
The sensor of 11. claims 10, wherein when watching on surface level, the visual field direction of each optical element in each array is different from the visual field direction of other optical element in this array.
The sensor of 12. claims 11, wherein optical element all has identical focal length.
The sensor of 13. claims 11, wherein the visual field of optical element is configured to form the light curtain of the volume that monitors.
The sensor of 14. claims 13, wherein changes the direction of each visual field on surface level to control the shape of this light curtain.
The sensor of 15. claims 11, wherein each visual field has the angular breadth substantially equating with other visual field.
The sensor of 16. claims 11, the wherein vicissitudinous scope of visual field tool of the optical element in each array.
The sensor of 17. claims 16, wherein has the superimposition of the most at least the first and second optical elements of long scope to form dead zone.
The sensor of 18. claims 11, wherein the optical element in each array and detector element separately become different angles, and from detector element separately, have substantially the same spacing, when watching on surface level, the visual field of optical element is directed on different angular direction separately thus.
The sensor of 19. claims 18, wherein the optical element in each array has the visual field of different range, when watching on surface level, the scope of the scope of the visual field of each the first optical element and the second optical element matches, to limit a pair of visual field, between this is to visual field, there is predetermined angular, and configure this optical element this is reduced along with increasing field range the predetermined angular between visual field.
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| US27996809P | 2009-10-29 | 2009-10-29 | |
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| US12/914284 | 2010-10-28 | ||
| PCT/US2010/054785 WO2011059830A2 (en) | 2009-10-29 | 2010-10-29 | Infrared motion sensor |
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| GB201211785D0 (en) * | 2012-07-03 | 2012-08-15 | Carclo Technical Plastics Ltd | Lens |
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| US10018510B2 (en) * | 2013-04-22 | 2018-07-10 | Excelitas Technologies Singapore Pte. Ltd. | Motion and presence detector |
| WO2015088470A1 (en) | 2013-12-09 | 2015-06-18 | Greenwave Systems, Pte. Ltd. | Motion detection |
| DE102014106854A1 (en) * | 2014-05-15 | 2016-01-28 | Odos Imaging Ltd. | Imaging system and method for monitoring a field of view |
| US9301412B2 (en) | 2014-06-02 | 2016-03-29 | Greenwave Systems Pte. Ltd. | Dual fixed angle security mount |
| US9611978B2 (en) | 2014-06-02 | 2017-04-04 | Greenwave Systems Pte Ltd | Magnetic mount for security device |
| US9854227B2 (en) | 2015-01-08 | 2017-12-26 | David G Grossman | Depth sensor |
| JP2016191611A (en) * | 2015-03-31 | 2016-11-10 | パナソニックＩｐマネジメント株式会社 | Human body detector and program used therefor |
| EP3078951A1 (en) * | 2015-04-10 | 2016-10-12 | Silverlight AG | Device with a pir sensor |
| WO2017136485A1 (en) * | 2016-02-03 | 2017-08-10 | Greenwave Systems PTE Ltd. | Motion sensor using linear array of irdetectors |
| WO2017147462A1 (en) | 2016-02-24 | 2017-08-31 | Greenwave Systems PTE Ltd. | Motion sensor for occupancy detection and intrusion detection |
| US20190323897A1 (en) * | 2017-01-13 | 2019-10-24 | The Research Foundation For The State University Of New York | Chopped passive infrared sensor apparatus and method for stationary and moving occupant detection |
| JP2021508934A (en) * | 2018-01-02 | 2021-03-11 | シグニファイ ホールディング ビー ヴィＳｉｇｎｉｆｙ Ｈｏｌｄｉｎｇ Ｂ．Ｖ． | Lighting device with motion sensor |
| US11506565B2 (en) | 2019-09-24 | 2022-11-22 | Falk PLI Engineering & Surveying, Inc. | Four-dimensional crane rail measurement |
| FI3933790T3 (en) | 2020-06-29 | 2023-09-26 | Haltian Oy | Apparatus for counting objects |
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- 2010-10-29 CN CN201080048697.XA patent/CN102713544B/en not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2011059830A2 (en) | 2011-05-19 |
| CN102713544A (en) | 2012-10-03 |
| EP2494322B1 (en) | 2020-02-26 |
| EP2494322A4 (en) | 2018-01-10 |
| US20110210253A1 (en) | 2011-09-01 |
| EP2494322A2 (en) | 2012-09-05 |
| WO2011059830A3 (en) | 2011-08-25 |
| US8354643B2 (en) | 2013-01-15 |
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